8.15.3 Engine coolant – Draining
Preconditions
☑
Engine is stopped and starting disabled.
WARNING
Coolant is hot and under pressure.
Risk of injury and scalding!
• Let the engine cool down.
• Wear protective clothing, gloves, and goggles / safety mask.
Preparatory steps
1.
Provide a suitable receptacle to catch the coolant.
2.
Switch off preheating unit.
Engine coolant – Draining
1.
Turn breather valve of filler neck on coolant expansion tank counterclockwise to first stop and allow pressure
to escape.
2.
Continue to turn breather valve counterclockwise and remove.
3.
Draw off separated corrosion inhibitor oil in expansion tank through the filler neck.
4.
Open drain valves and/or drain plugs and
drain coolant at the following points:
• at HT coolant pump elbow
• on crankcase, left and right sides.
• at preheating unit
5.
Close all open drain points.
6.
Position breather valve on filler neck and
close.
M015565/03E 2016-02
| Coolant Circuit, General, High-Temperature Circuit | 113
TIM-ID: 0000000936 - 005
